Upside down shuttle friction



Nov. 5, 1935. w. s. JAG/(SON 2,019,859

UPS IDE DOWN SHUTTLE FRICTION Filed May 24, 1935 2 SheetS -Sheet 1 3O 5 B 3 4 H H3 H2. I00 12 I0 0 0 mum! "4 INVENTOR.

13; 33 24% XMWW 76- Q 1*95 ATTORNEY.

Nov. '5, 1935- w. s. JACKSON 2,019,359

UPSIDE DOWN SHUTTLE FRICTION Filed May 24, 1955 2 Sheets-SheetZ na I2. I&\ A s y Patented Nov. 5, 1935 UNITED STATES PATENT "OFFICE UPSIDE DOWN SHUTTLE FRICTION Island Application May 24, 1935, Serial No. 23,198

' 7 Claims. (cuss-217) This invention relates to such friction devices as are usually located between the bobbin and the outlet of an eye in a shuttle to produce a drag on the thread as it unwinds from the bobbin.

The device is most useful in an automatic shuttle where the thread of a new bobbin is fastened and where the unwinding thread should be caught by some sortof friction device as soon as possible. The thread is caught in this device during the first part of the first pick after a new bobbin is put in the shuttle.

After it is once caught, the thread will almost never escape from the friction members and. unthread or run loose over any part of the shuttle.

The quick catching of the thread and the holding of it by this friction device prevents loops from springing off the bobbin and either getting into the cloth or forming kinks which break the thread.

Most shuttles have a bobbin chamber which goes through the shuttle and a forward extension known as the threading chamber which conmeets with the delivery eye. In the automatic shuttle, this threading chamber extends down from the top and does not usually go through and usually is partly in the wood and partly in a metal threading block. The thread usually passes around a vertical thread pin and frequently under a nose and under and back of a horn.

' There are a number of well-known friction devices in which there is a slot with spreading lips which extend down from the top, sometimes to a dead end, and sometimes right through to the bottom, but in every case, in threading on the first pick or on any other pick, the thread between the point where it is held and the bobbin, goes down between the lips from the top. If the thread unthreads during weaving, it rethreads by going out between these lips at the top.

There are other well-known friction devices which include a strip of felt either at the bottom or at the top. In this device, I provide at the back of the threading chamber and at the front of the bobbin chamber, a friction member which extends over and down transversely of the threading chamber, but so positioned thata-s the thread unwinds, it slips over its free edge and then up into a dead end slot in which there is a friction; device or friction devices. a

The preferred type includes twooppositely disposed friction plates which extend down inside this slot and are loosely mounted near their tops on a transverse pin, .and which, at the bottom,

have toes which enter toe holes at the bottom on each side of the vertical slot adjoining suitable downwardly facing lips on each side of the slot.

With this construction, the thread is instantly 5 caught at the beginning of the first pick, and when once caught, can get out only with very great difiiculty and on very rare occasions. If it does get out, it will instantly rethread and get back into place before any damage is done to the cloth.

Another advantage is that in automatic looms of the type in which a bobbin on which the filling is nearly exhausted is hammered down through the bobbin chamber, the trailing end, which frequently is caught by the thread of the new full bobbin and carried into the cloth, is entirely freed from the friction and is carried down along with the discharged bobbin.

The adjoining part of the floor of the threading chamber is preferably proximate the bottom or mouth of the slot to prevent unthreading, but it and the rest of the floor and adjoining parts should be so cut as to permit instant threading.

In the drawings, Fig. 1 is a plan view of the eye end of a shuttle with the device in place.

Fig. 2 is a side elevation from the bottom of Fig. 1.

Fig. 3 is a vertical section on line 33 of Fig. 1 looking towards the right.

' Fig. 4. is an enlarged vertical section on line 4-4 of Fig. 1 looking towards the right.

Fig. 5 is an elevation of the threading block with the friction member attached, viewed from the side opposite the outlet eye.

Fig. 6 is a view similar to Fig. 4, of a modification.

, Fig. '7 is a View similar to Fig. 4, of another modification.

Fig. 8- is a view similar to Fig. 4, of another modification.

Fig. 9 is a; view similar to Fig. 4, of still another modification.

Fig. 10 is a vertical longitudinal section on. the

line Ill, 10 of Fig- 1.

Fig. 11 is av front elevation of the shuttle block removed from. the. shuttle.

Fig. 12 is a sectional View on the line l2, 12 of Fig. 10.

Fig. 13 is a plan view of the device attached to another type of shuttle block forming another shape of threading chamber. 7 a Fig. 14 is a section on line l4, I4 of Fig. 13.

' Fig. 15 is a section on line i5, I5'oi Fig. 13.

extends forward from the bobbin chamber but' which ordinarilly does not go through the shuttle. 32 is a diagonal backwardly extendingcut which connects the threading chamber 3I with the outlet eye 33. I

B is a bobbin of any usual type, and T is the thread which passes from the bobbin through the threading chamber and out the eye.

In the type of shuttle shown in Figs. 1 to 12 A is what is known as a threading block made of metal through which at I I is part of the threading chamber which cooperates with threading chamber 3| in the wood.

As shown, this block A extends forward to a nose I2 from which there extends backwardly a front hook I I2 and from which also extends one side I32 of the slot or channel 32 which connects the threading chamber with the outlet eye 33 in the wood.

There is also the usual downward and backwardly sloping horn I 6 behind which and in front of thread pin I4, the thread passes when the shuttle is threaded and in action.

Most of the above features of the shuttle block are old and well-known, and I also provide on the side of the threading chamber I I opposite the nose I2, the forward part of a guard IE) of a well-known type. However, instead of this guard extending back at the level of the top of the shuttle, it is preferably cut down sharply at I09 so as to slope back to the bottom back end of the floor IIII of threading chamber II, and for convenience in threading and cooperating with the backwardly extending front hook II2, it is cut away at II3.

F represents a friction carrier which may be a part of, or rigidly attached to block A, or which may be entirely independent thereof.

A preferred construction is to locate carrier F directly back of block A in such a way that there is ample free space between it and the bottom part of threading chamber II and cut back part I00.

This friction carrier extends up at 28 over and down transversely, forming a sort of hook 20, the outside face of which 29 curves over and around and back to a downwardly facing lip 23 on one side of the dead end slot 2I which extends upwardly into friction carrier F, and which has another side 22 which extends down and terminates in another lip 24. Near the bottom on each side of slot 2I are toe holes, respectively 26 and 21.

G is a relatively fixed plate having near the top, a pin hole 45 through which passes loosely a pin 25 which preferably has a threaded head by which it can be easily removed. The face 40 of this plate is preferably rounded at front and back,

i and is bent outwardly at the bottom to form a toe 46 which is adapted to and does enter a toe hole 26.

This plate G serves as a wearing surface, and might have behind it, a spring; similar to what is shown in Fig. 8 at 88, but I'find it desirable to reached from the outer side of support part 28 when friction l carrier F is removed from the I shuttle.

In Fig. 6, in place of one or two friction plates, I show a friction carrier L which, as a post part,

extends up at 69, out and over as a hook 65 in a suitable curve. This curve swings around, forming one of the lips 66 opposite another lip 6? of the upwardly extending dead end slot 68, and in this I locate the U-shaped spring friction member K.

This member K is sharply bent at 68 and extends down to form the friction faces or sides GI and 63, and then is bent outwardly at 62 and 64 to form toes which enter toe holes I85 and I54.

Such a spring friction member can be sprung into place and while preferably somewhat loose, may

serve the desired purpose.

In Fig. 7 is another modification in which E is the friction carrier with a hook side 19 and lips 1|, and a post side 73 with the lip 12 between which is the upwardly extending slot I5. In this slot I5 is glued an U-shaped piece of felt M in such a way that the thread T will pass between the two sides I4 and I6.

As shown in Fig. 8, I may use a combination of felt and spring in a friction carrier N, having the upwardly extending slot 8! between the post side 88 and the hook side 82, there being a strip of felt 83 glued to the side and a pin 84, on which at the other side is loosely mounted a friction plate 85 which terminates at the bottom in a toe 87 in toe hole 86. The compression spring 88 is adjustably held back of plate 85 by adjusting screw 89.

As shown in Fig. 9, the friction carrier P may be provided with the upwardly extending slot 90 and with the toe holes SI and 92, together with the two movable friction plates 93 and 94 with toes respectively 95 and 96 which enter the toe holes, there being behind each plate a spring such as 91 or 98, held adjustably by an adjusting screw 99 or 11.

Carrier F is shown as pinned to block A by pins I and 2 but carriers L, E, N, P are integral with a threading block similar to A or to R in Figs. 13, 14 and 15 or of any other shape.

Block R has a spreading threading slot 5|, a. nose 52 and a floor 55 to which carrier F is attached by pins such as 56.

A pin or pins 58 may be used to hold block R in place and also to help keep the thread from getting out of the dead end slot 2 I.

Obviously carrier F could be used alone in a shuttle such as shown in Figs. 13, 14 and 15, but in which the block R was merely part of the wood of the shuttle. V

I claim:

1. The combination in a self-threading shuttle having a bobbin chamber which extends through the shuttle and a threading chamber in forward extension thereof which connects with an eye through one side under a horn and under a forwardly extending nose with a backwardly extending front hook, said threading chamber being cut vslot which extends upward thereinto, there be- I ving near the bottom oppositely disposed toe holes;

vertical friction plates which extend down inside the slot and are loosely mounted on a transverse pin near the top and which have toes at their bottom ends which enter the toe holes; and a compression spring behind one plate.

2. The combination in a self-threading shuttle having a bobbin chamber which extends through the shuttle and a threading chamber in forward extension thereof which connects with an eye through one side under a horn and under a forwardly extending nose with a backwardly extending front hook; of a back friction carrier which extends over and down transversely at the back of the threading chamber and which has a dead end slot which extends upward thereinto, there being near the bottom oppositely disposed toe holes; vertical friction plates which extend down inside the slot and are loosely mounted on a transverse pin near the top and have toes at their bottom ends which enter the toe holes; and a compression spring behind one plate.

3. The combination in a self-threading shuttle having a bobbin chamber which extends through the shuttle and a threading chamber in forward extension thereof which connects with an eye through one side and under a forwardly extending nose; of a back friction carrier which extends over and down transversely at the back of the threading chamber and which has a dead end slot which extends upward thereinto, there being near the bottom oppositely disposed toe holes; vertical friction plates which extend down inside the slot and which have toes at their bottom ends which enter the toe holes; and a compression spring behind one plate.

4. The combination in a self-threading shuttle having a bobbin chamber which extends through the shuttle and a threading chamber in forward extension thereof which connects with an eye through one side and under a forwardly extending nose; of a back friction carrier which extends over and down transversely at the back of the threading chamber and which has a dead end 5 slot which extends upward thereinto, there being friction members which extend down on each side of the slot.

5. The combination in a self -threading shuttle having a bobbin chamber which extends through 10 the shuttle and a threading chamber in forward extension thereof which connects with an eye through one side and under a forwardly extending nose, said threading chamber being cut away on one side to receive the thread as it unwinds 15 from the bobbin and to direct it into a friction carrier; of said friction carrier which extends over and down transversely at the back of the threading chamber and which has a dead end slot which extends upward thereinto, there be- 20 ing friction members which extend down on each side of the slot.

6. The combination in a shuttle having a bobbin chamber which extends through the shuttle and a threading chamber in forward extension 25 thereof which connects with an eye through one side; of a friction carrier which extends over and down transversely at the back of the threading chamber and which has a dead end slot which extends upward thereinto, there being friction 30 members which extend down on each side of the slot, the adjoining part of the floor of the threading chamber being proximate the bottom of the slot to prevent unthreading.

7. The combination in a shuttle having a bob- :5 bin chamber and a threading chamber in forward extension thereof which connects with an eye through one side; of a friction carrier which extends over and down transversely near the back of the threading chamber and which has a dead 40 end slot which extends upward thereinto, there being friction members which extend down on each side of the slot.

WILLIAM SMITH JACKSON. 

